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Author SHA1 Message Date
Aditya Nandakumar c0333f7184 Revert "Revert rr340111 "[GISel]: Add Legalization/lowering code for bit counting operations"" 
This reverts commit d1341152d91398e9a882ba2ee924147ea2f9b589.

This patch originally made use of Nested MachineIRBuilder buildInstr
calls, and since order of argument processing is not well defined, the
instructions were built slightly in a different order (still correct).
I've removed the nested buildInstr calls to have a defined order now.

Patch was tested by Mikael.

llvm-svn: 340309
 2018-08-21 17:30:31 +00:00
Reid Kleckner 918930adf9 Revert rr340111 "[GISel]: Add Legalization/lowering code for bit counting operations" 
It causes LegalizerHelperTest.LowerBitCountingCTTZ1 to fail.

llvm-svn: 340186
 2018-08-20 16:50:19 +00:00
Aditya Nandakumar 59b2485ba2 [GISel]: Add Legalization/lowering code for bit counting operations 
https://reviews.llvm.org/D48847#inline-448257

Ported legalization expansions for CTLZ/CTTZ from DAG to GISel.

Reviewed by rtereshin.

llvm-svn: 340111
 2018-08-18 00:01:54 +00:00